I believe positive thinking can do wonders to one's psychology and self-esteem, and therefore help them achieve things that are up to them. Our hair growth, though is not up to us! Have you maybe considered that the faster length-gain might have come from your curls loosening-up? Because at your photos I noticed that from the moment you claim that your hair started growing faster, your curls where looser as well.. I don't think that's a coincidence!